Uh, the first comment here says the achievements only work on 2 player mode. Now that probably isn't good but there's no use wondering what happened when the answer is right there.

11 Nov
9:38 2015

These beat the game together with 2 players ones are bizarre and appear elsewhere on the site (Jackal). It's completely inconsistent with everything on RA being 1P

19 Jan
12:29 2016

someone fix these achievements please!

30 Mar
1:10 2016

It's OK if "some" of the achievements are 2P, but it's entirely wrong that the entire set is 2P, by any means of imagination. This is not SFV, and you see the reaction to online-only games. Please nerf these 2P stuff and put some 1P stuff in.Thanks

19 Aug
1:08 2016

Play with 2P, but achivements not set to 2 frogs. Only P1 :(

7 Sep
11:45 2016

Almost all achievements are broken! Needs fix ASAP!

7 Oct
5:33 2016

There is seems to have a problem with beating the game with the heroes. I was spying on your code and i found that the memory 0x000040 Vide del jefe, sometimes get stuck at the HEX value of [0f] thats 15, i recommend using this memory 0x000042 = 01

2 Nov
4:16 2016

What rom a should use ? Already finish the game with Rash and Jimmy, and not trigger !!